We are reporting a case of a 39-year-old woman with a picture of constipation, who came to our department. Anamnesticly she claimed on constipation and flatulence for 6 days, and on slight cough for last two days, but no other symptoms. After complete diagnostic treatment we found a pleural effusion in right lung and ascites in a bowel. Cytologicly, we didn't find malignant cells in pleural effusion nor in ascites, but there was an amount of eosinophilic granulocytes in a gastric wall and a solid tumour mass near mesentery of a gut. We also found a lot of eosinophilic cells in a solid tumour mass. Other organs had no pathology. This finding indicated for eosinophilic gastroenteritis.